The misapprehension may stem from this finding: 41% of respondents said they had never heard of PreCheck.

Those are among the notions about the TSA and its procedures and programs that the survey of 2,234 adults revealed. The survey was offered online from March 12-17.

Among other findings:

--37% think that PreCheck applicants should have to pass a drug test. This is not required, and the survey did not reveal why respondents correlated drug use with security.

--89% of respondents don’t think they’ll be able to get on a plane if they don’t have their identification. In the past, the TSA has told me that there are other ways to verify your identity, although you may not make your original flight because of the extra time needed to establish who you are.

--Half of respondents think TSA screeners make air travel safer, but 43% say they are neither “more nor less safe” and 7% say they are somewhat or a lot less safe.